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| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Reading Lamps B+ | 1, 2, 3 | 1 | -- | -- |
Reading Lamps Ground Terminal 6 | -- | 1 | -- | -- |
1. Reading Lamps Always OFF 2. Sunshade Lamps Always OFF 3. Instrument Panel Compartment Lamp Always OFF | ||||
The body control module (BCM) supplies the reading lamps, sunshade and instrument panel compartment lamp with battery voltage. When switching on the following components the concerning lamps will illuminate:
| • | Reading lamps |
| • | Sunshade - left front |
| • | Sunshade - right front |
| • | Instrument panel compartment lamp |
Interior Lighting Systems Description and Operation
Control Module References for scan tool information
Ignition ON, switch the reading lamps ON and OFF while observing the lamp. The concerning reading lamp should illuminate when switched ON.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If less than the specified range, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, setup, and programming |
| © Copyright Chevrolet. All rights reserved |
| © Copyright Chevrolet. All rights reserved |
